Bile RefluxGastrectomyPilot Projects
Dr. Mark Douglas Duncan, MD
NPI1225079593PAC ID4183817992
- Medicare services, 2024
- 129
- Medicare patients, 2024
- 116
- Publications
- 8
- MIPS score, 2024
- 83
- Hospital affiliations
- 2
- Practice address
- 4940 Eastern Avenue, Baltimore, MD 21224
- Practice phone
- Call (410) 550-0123
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Duncan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark Douglas Duncan is a general surgeon in Baltimore, Maryland
Dr. Duncan practices at Johns Hopkins Bayview Medical Center in Baltimore, Maryland, part of Johns Hopkins Health System.
Dr. Duncan's NPI, 1225079593, was assigned on June 9, 2006. Dr. Duncan graduated from Mayo Medical School in 1987. Dr. Duncan holds Maryland license D51208.
NPI and contact details
- NPI
- 1225079593NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183817992
- NPI enumeration date
- June 9, 2006
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (410) 550-0123
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Douglas Duncan practices at Johns Hopkins Bayview Medical Center in Baltimore, Maryland
Dr. Duncan's primary practice is Johns Hopkins Bayview Medical Center, at 4940 Eastern Avenue, Baltimore, MD 21224 in Baltimore City. The practice phone is (410) 550-0123.
- Johns Hopkins Bayview Medical Center4940 Eastern Avenue, Baltimore, MD 21224 · Baltimore CityPhone(410) 550-0123
Source: Dmand AI Affiliation Data
Dr. Mark Douglas Duncan is affiliated with 2 sites of care and 3 medical groups
Dr. Duncan's primary practice is Johns Hopkins Bayview Medical Center in Baltimore, Maryland, part of Johns Hopkins Health System. Dr. Duncan is also affiliated with The Johns Hopkins Hospital. The medical group on file is Johns Hopkins University. Dmand AI also links Dr. Duncan to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Douglas Duncan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duncan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Johns Hopkins Bayview Medical Center | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Duncan practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Johns Hopkins Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Douglas Duncan is one of 532 general surgeons in Maryland
Surgery is Dr. Duncan's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Duncan is licensed in Maryland.
Specialties and state licenses
- Surgery, MarylandPrimary
General surgeons near Dr. Duncan
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
532general surgeons in Maryland155general surgeons in Baltimore12general surgeons at Johns Hopkins Bayview Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Douglas Duncan billed Medicare for 129 services in 2024
CMS data shows 129 Medicare services from Dr. Duncan across 5 procedure codes in 2024, for 116 Medicare patients. Medicare paid $19,050 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024129
Medicare patients116
Paid by Medicare$19,050
Procedure codes5
Dr. Duncan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1282024: 11510%
- Surgery
- 2023: 192024: 1426%
Dr. Duncan compared with the Maryland median for general surgeons, 2024
- Dr. Duncan
- Maryland median
- Medicare services
- 129vs 23044% below
- Medicare patients
- 116vs 16228% below
Medians across 485 general surgeons in Maryland with Dmand AI profiles that report each measure.
Dr. Duncan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Duncan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duncan and other general surgeons in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Douglas Duncan treated 116 Medicare patients in 2024, average age 73
CMS counts 116 Medicare patients who saw Dr. Duncan in 2024. The largest group is 65 to 74, with 54 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 19% are also on Medicaid. Their average risk score is 1.82, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Duncan's median patient age at 73, with 53% women.
Medicare patients, 2024116
Average age73
Average risk score1.82
Also on Medicaid19%
Dr. Duncan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Duncan's Medicare patients by sex, 2024
- Women6657%
- Men5043%
Chronic conditions among Dr. Duncan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis49%
- Diabetes45%
- Ischemic heart disease41%
- Anxiety34%
- Cancer34%
- Chronic kidney disease34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duncan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Douglas Duncan scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Duncan for performance year 2024, reported as part of a group. CMS lists Dr. Duncan as offering telehealth.
- Offers telehealth
- Yes
Dr. Duncan's MIPS scores, performance year 2024
- 83of 100Final score
- 73.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Find general surgeons like Dr. Duncan by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark Douglas Duncan has 8 publications on record
Dmand AI links 8 papers to Dr. Duncan, published from 2011 to 2022. 2019 was the busiest year, with 2. The most frequent topics are Stomach Neoplasms and Gastrectomy. Dr. Duncan has published most often in J Surg Res. Dr. Duncan's most frequent co-authors are Alex Bryant Blair, MD, Sandra Renae Dibrito, MD, PhD and Mehran Habibi, MD.
Papers8
Years published2011 to 2022
Dr. Duncan's papers by year, 2011 to 2022
Topics Dr. Duncan writes about most
- Stomach Neoplasms
- Gastrectomy
Dr. Duncan's most frequent co-authors
- Alex Bryant Blair, MD2 shared papers
- Sandra Renae Dibrito, MD, PhD2 shared papers
- Mehran Habibi, MD2 shared papers
Recent publications by Dr. Duncan
J Surg Res
Antigens, CDCadherinsGastrectomy
Cell Line, TumorDeoxycytidineGemcitabine
See who Dr. Duncan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Duncan works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark Douglas Duncan received $5,755 in industry payments from 2022 to 2025
CMS Open Payments shows 12 general payments to Dr. Duncan from 2 drug and device companies from 2022 to 2025. Education make up the largest share, 96% of the total. Intuitive Surgical, Inc. paid the most, $5,699.
General payments to Dr. Duncan by program year, 2022 to 2025
General payments to Dr. Duncan by kind, 2022 to 2025
$5.8Kin total
- Education$5,50096%
- Food and beverage$2364%
- Travel and lodging$190%
Companies that paid Dr. Duncan the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Douglas Duncan graduated from Mayo Medical School
Dr. Duncan graduated from Mayo Medical School in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Douglas Duncan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark Douglas Duncan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark Douglas Duncan's NPI number?
Dr. Mark Douglas Duncan's NPI number is 1225079593. It was assigned on June 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Douglas Duncan?
Dr. Mark Douglas Duncan is a general surgeon in Baltimore, Maryland. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Mark Douglas Duncan practice?
Dr. Duncan practices at 4940 Eastern Avenue, Baltimore, MD 21224. Dr. Duncan's primary practice is Johns Hopkins Bayview Medical Center in Baltimore, Maryland, part of Johns Hopkins Health System. Dmand AI also links Dr. Duncan to 2 medical groups.
What is Dr. Mark Douglas Duncan's office phone number?
The practice phone on file for Dr. Duncan is (410) 550-0123.
What is Dr. Mark Douglas Duncan's medical license number?
Dr. Duncan holds Maryland license D51208.
Which hospitals is Dr. Mark Douglas Duncan affiliated with?
Dr. Duncan practices at Johns Hopkins Bayview Medical Center in Baltimore, Maryland. Dr. Duncan is also affiliated with The Johns Hopkins Hospital.
What medical group is Dr. Mark Douglas Duncan part of?
Dr. Duncan is linked to Johns Hopkins University. Dmand AI links Dr. Duncan to 2 more medical groups.
Does Dr. Mark Douglas Duncan accept Medicare?
Yes. CMS data shows Dr. Duncan billed Medicare for 129 services in 2024.
Does Dr. Mark Douglas Duncan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Duncan as offering telehealth services.
What is Dr. Mark Douglas Duncan's MIPS score?
Dr. Duncan's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Mark Douglas Duncan see?
CMS counts 116 Medicare patients who saw Dr. Duncan in 2024, with an average age of 73.
What services does Dr. Mark Douglas Duncan bill to Medicare?
In 2024, Dr. Duncan's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and office visit, new patient (99205).
Where did Dr. Mark Douglas Duncan go to medical school?
Dr. Duncan graduated from Mayo Medical School in 1987.
Has Dr. Mark Douglas Duncan received payments from drug or device companies?
CMS Open Payments shows $5,755 in general payments to Dr. Duncan from 2 companies from 2022 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Mark Douglas Duncan been practicing?
Dr. Duncan graduated from medical school in 1987, 39 years ago.
Does Dr. Mark Douglas Duncan do research?
Dmand AI links 8 publications to Dr. Duncan, published from 2011 to 2022.
Who does Dr. Mark Douglas Duncan publish with?
Dr. Duncan's most frequent co-authors are Alex Bryant Blair, MD (2 shared papers), Sandra Renae Dibrito, MD, PhD (2 shared papers) and Mehran Habibi, MD (2 shared papers).
Selling to surgery practices?
See general surgeons in Maryland by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card